9 Troubleshooting and Maintenance
User Manual
56
Fault
Code
Description
Troubleshooting
is overcurrent of PV1 input.
input.
022
Inverter has checked that there
is overcurrent of PV2 input.
Check the layout and the wiring of PV2
input.
023
PV configuration mode has
changed during inverter
running.
Check the PV input configuration mode
and restart the inverter when necessary.
024
Inverter has checked the
deviation of neutral point
voltage.
1. Inverter will recover if the deviation
value falls below the protective limit.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
025
Inverter has checked out the
unbalance of neutral point
voltage temporarily.
1. Inverter will recover if the deviation
value falls below the protective limit.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
026
There is high Bus fluctuation
voltage.
1. This is a short-term fault. Wait a
moment for inverter recovery.
2. If the fault still exists, please contact
Sungrow Service Dept..
027
The DC current is not balanced
between the two PV inputs for
parallel PV configuration mode.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
036
The temperature of module is
too high
1. Check whether AC output power
exceeds nominal power too much.
2. Check whether fans work normally
and whether there are some abnormal
fans. Please replace broken fan, in
necessary.
3. Clean air grills of outlet.
4. If the fault still exists, please contact
Sungrow Service Dept..
037
The ambient temperature is too
high
038
The inverter has checked that
there is a fault of relay.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
039
The insulation resistance is low.
(ISO-flt)
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
040 IGBT
saturation
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
041
There is a fault with sampling
channel.
1. Wait a moment for inverter recovery.
2. If the fault occurs repeatedly, contact
Sungrow Service Dept..
042 Current
imbalance.
If the fault occurs repeatedly, contact
Sungrow Service Dept..
043
The ambient temperature falls Disconnect inverter to stop. Wait for
